Castle Loch, also known as the Scottish Castle, Lord Callan's Castle, or just Callan Castle, is a Sodor landmark situated between Dubbyn Moar and Loey Machan. It was found by Toby in Toby's Discovery. It is home to Lord Callan.
It was first seen in the fifth season and was re-opened in the seventh. It has become a popular tourist attraction and appeared often until the eleventh season. It returned to the series in CGI in the fifteenth season episode, Spencer the Grand and has appeared since.
- Lord Callan flies the Scottish flag on days of ceremony.
- After the fifth season, the castle's appearance changed.
- Henry once had to collect a new flagpole for the castle.
- The model of the castle is on display at Drayton Manor.